Jumbo Corporation is dedicated to creating globally competitive products under its vision "Passion to Life," aiming to become Japan's most beloved service by December 2025. With a primary focus on a real-time communication app that has amassed over 11 million members, the company operates with a strong in-house development team, where 33 of its 50 employees are developers working across mobile, web, backend, and infrastructure. To address the challenges of code review burden and variability in review quality, Jumbo has adopted CodeRabbit, an AI tool that initially caught their attention through a social media post. This tool has helped reduce the mental load on developers by automating initial code reviews, filtering out careless and syntactic errors, and allowing human reviewers to focus on more substantial feedback. CodeRabbit's early entry into the AI review market, combined with its customizability via YAML files, has made it a preferred choice despite using other services in parallel. Jumbo continues to refine its use of CodeRabbit, anticipating further enhancements like flexible setting permissions and compatibility with models beyond OpenAI, such as Claude, to broaden its application.